Gel Immersion Endoscopic Mucosal Resection (EMR) for Superficial Nonampullary Duodenal Epithelial Tumors May Reduce Procedure Time Compared with Underwater EMR (with Video)

Table 1

Characteristics of patients and lesions.

	UEMR	GIEMR
Patients/lesions	14/14	9/10	0.66^1
Male	10 (71%)	5 (56%)
Female	4 (29%)	4 (44%)
Median age (range, years)	62; (41–78)	67; (51–81)	0.16^2
Location			0.64^3
Bulb	1 (7%)	2 (20%)
Second portion, preampulla	5 (36%)	3 (30%)
Second portion, postampulla	8 (57%)	5 (50%)
Morphology			0.30^3
Sessile type	1 (7%)	3 (30%)
Superficial elevated type	10 (71%)	6 (60%)
Superficial depressed type	3 (21%)	1 (10%)
Median tumor diameter size (range, mm)	6; (3–12)	10; (7–18)	0.0077^2
Histological type			0.10^3
Adenoma	11 (79%)	5 (50%)
Intramucosal carcinoma	3 (21%)	5 (50%)
Operators’ experience			0.16^1
Expert	14 (100%)	8 (80%)
Nonexpert	0 (0%)	2 (20%)

¹Fisher’s exact test. ²Mann–Whitney test. ³ test. GIEMR: gel immersion endoscopic mucosal resection; UEMR: underwater endoscopic mucosal resection.